Apparently between movies Elisha Cook lived in a cabin up in the Sierra Nevada, fly fishing. When they wanted him, they'd send someone up to find him, he'd come down to do the movie, then head back for the mountains.
If so ... he must have done a lot of flying because he was sure in a LOT of things! A bunch of Bogie classics, Shane, Rosemary's Baby (!!!), an original Star Trek episode, Gunsmoke, Perry Mason, Peter Gunn, Magnum P.I., I Spy, literally dozens and dozens of TV series over the decades, not even counting the TV movies and motion pictures he was in ... had to have been one of the hardest working most in-demand actors in the business. Just the names alone of the movies, TV series, and major motion pictures he was in is well over 200, and that's not counting multiple time he appeared on TV shows like Rawhide, Batman, Wagon Train, The Man from U.N.C.L.E. ...
In my book, that makes him one of the most successful Hollywood actors ever!